Are they choke tube guns?? made after 83 or so
I have a 12 3" and a 12ga 3 1/2 and nothing on either but these are late 90's or so
The ones I have seen were when they first came out in 79 or so and most in the early 80's were TRAP models
They seemed to eliminate it mid 80's
You are probably very accurate in your guesstimations.
The ones I have seen are fixed chokes. (older)


















































